Or is it just greenwash?
"A combination of that and niche applications. Even if you could get the energy density of jet fuel in a battery, the size and mass of an electric drive of equivalent power to a gas turbine would be prohibitive. Peak power from a big turbofan is around 50 MW, and a 747 or A380 uses four of those."
1HP = 750W
2MW = 2,700HP
... This is from Siemens, one of the partners.
"For global oil & gas mechanical drive and power generation applications, the Industrial RB211 gas turbine systems have earned a market leading reputation as the most reliable and efficient in their class. Available from 37,465 to 45,316 horsepower at ISO conditions, more than 700 units have been sold, recording over 30 million operating hours."
Call it 40,000HP which works out to be 30MW. Just confirming the numbers and I'll qualify the difference between 50MW and 30MW by suggesting that something on the ground loses some efficiency by not travelling at 500MPH such that it can gulp more air.
However... The 'test bed' is an BAe 146...
Take 50MW down to 6MW.
I'd still call bullshit, including my own guesses, but it does not seem totally beyond the bounds of something worth having a shit at.